This sandy alcove, sandwiched between two, long, rocky groynes, looks across to Lisbon from the southern fringe of the Tejo / Tagus rivermouth. When a big swell hits, the accumulated sand throws up powerful, short, wedgy waves popular with a loyal bodyboarding crew. There is a right breaking off the northern groyne, as well as a left to the south. The waves are hollow and heavy. The swell angle is important as the rivermouth can cut out some of the size.
Source: Cova do Vapor Surf Guide